EIA Data Shows Steady Rise in U.S. Underground Natural Gas Capacity

US underground natural gas storage capacity increased slightly in 2025, according to EIA data, with growth mainly in the South Central and Mountain regions. Both demonstrated peak capacity and design capacity rose modestly, reflecting continued use of existing facilities and limited new expansion.

Demonstrated peak capacity in the Lower 48 states increased by 6 Bcf, continuing a three-year upward trend, while total design capacity rose by 26 Bcf to 4,683 Bcf. Regional gains were strongest in the South Central and Mountain areas, offset by small declines in the Midwest, Pacific, and East regions. Overall, the changes indicate steady but incremental growth in US natural gas storage infrastructure.